EN ISO 13160:2021

Water quality - Strontium 90 and strontium 89 - Test methods using liquid scintillation counting or proportional counting (ISO 13160:2021)

This document specifies conditions for the determination of 90Sr and 89Sr activity concentration in samples of environmental water using liquid scintillation counting (LSC) or proportional counting (PC).
The method is applicable to test samples of drinking water, rainwater, surface and ground water, marine water, as well as cooling water, industrial water, domestic, and industrial wastewater after proper sampling and handling, and test sample preparation. Filtration of the test sample and a chemical separation are required to separate and purify strontium from a test portion of the sample.
The detection limit depends on the sample volume, the instrument used, the sample count time, the background count rate, the detection efficiency and the chemical yield. The method described in this document, using currently available LSC counters, has a detection limit of approximately 10 mBq l−1 and 2 mBq l−1 for 89Sr and 90Sr, respectively, which is lower than the WHO criteria for safe consumption of drinking water (100 Bq·l−1 for 89Sr and 10 Bq·l−1 for 90Sr)[3]. These values can be achieved with a counting time of 1 000 min for a sample volume of 2 l.
The methods described in this document are applicable in the event of an emergency situation. When fallout occurs following a nuclear accident, the contribution of 89Sr to the total amount of radioactive strontium is not negligible. This document provides test methods to determine the activity concentration of 90Sr in presence of 89Sr.
The analysis of 90Sr and 89Sr adsorbed to suspended matter is not covered by this method.
It is the user’s responsibility to ensure the validity of this test method selected for the water samples tested.

Wasserbeschaffenheit - Strontium-90 und Strontium-89 - Verfahren mittels Flüssigszintillationszählung oder Proportionalzählung (ISO 13160:2021)

Dieses Dokument bietet eine Auswahl an Prüfverfahren und ihre dazugehörigen Grundlagen für die Messung der Aktivität von 90Sr im Gleichgewicht mit 90Y und 89Sr, reinen Beta-Strahlen emittierenden Radionukliden, in Wasserproben. Es werden verschiedene chemische Trennverfahren zur Herstellung von Strontium- und Yttrium-Messproben erläutert, deren Aktivität mittels eines Proportionalzählers (PC, en: proportional counter) oder Flüssigszintillationszählers (LSC, en: liquid scintillation counter) bestimmt wird.
Die Auswahl eines speziellen Prüfverfahrens ist abhängig vom Ursprung der Kontamination, von den Eigenschaften des zu analysierenden Wassers, der erforderlichen Genauigkeit der Prüfergebnisse und von den verfügbaren Ressourcen der Labore.
Diese Prüfverfahren werden zur Wasserüberwachung eingesetzt. Sie erfassen vergangene oder gegenwärtige Störfall bedingte oder routinemäßige, flüssige oder gasförmige Ableitungen. Dies beinhaltet auch die Überwachung der vom weltweiten Fallout verursachten Kontamination.
Bei einem Fallout unmittelbar nach einem nuklearen Unfall, ist der Beitrag von 89Sr bezogen auf die Gesamtmenge an Strontium-Aktivität nicht unerheblich. Dieses Dokument umfasst die Prüfverfahren zur Bestimmung der Aktivitätskonzentration von 90Sr bei Vorhandensein von 89Sr.

Qualité de l'eau - Strontium 90 et strontium 89 - Méthodes d'essai par comptage des scintillations en milieu liquide ou par comptage proportionnel (ISO 13160:2021)

Le présent document spécifie les conditions de la détermination de l’activité volumique du 90Sr et du 89Sr d’échantillons d’eau environnementale par comptage des scintillations en milieu liquide (CSL) ou comptage proportionnel.
La méthode est applicable aux échantillons pour essai d’eau potable, d’eau de pluie, d’eau de surface et d’eau souterraine, d’eau de mer, ainsi que d’eau de refroidissement, d’eau industrielle, d’eaux usées domestiques et industrielles après échantillonnage, manipulation de l’échantillon et préparation de l’échantillon pour essai appropriés. La filtration de l’échantillon pour essai et une séparation chimique sont requises pour séparer et purifier le strontium d’une prise d’essai de l’échantillon.
La limite de détection dépend du volume de l’échantillon, de l’instrument utilisé, de la durée de comptage de l’échantillon, du taux de comptage du bruit de fond, du rendement de détection et du rendement chimique. La méthode décrite dans le présent document, avec les compteurs CSL actuellement disponibles, a une limite de détection d’approximativement 10 mBq l−1 et 2 mBq l−1 pour 89Sr et 90Sr, respectivement, ces valeurs étant inférieures aux critères de sécurité de l’OMS pour la consommation d’eau potable (100 Bq·l−1 pour 89Sr et 10 Bq·l−1 pour 90Sr)[3]. Ces valeurs peuvent être obtenues avec une durée de comptage de 1 000 min pour un volume d’échantillon de 2 l.
Les méthodes décrites dans le présent document sont applicables en situation d’urgence. Dans le cas de retombées récentes se produisant après un accident nucléaire, la contribution du 89Sr à la quantité totale de strontium radioactif n’est pas négligeable. Le présent document fournit les méthodes d’essai permettant de déterminer l’activité volumique du 90Sr en présence de 89Sr.
L’analyse du 90Sr et du 89Sr adsorbés sur les particules en suspension n’est pas couverte par la présente méthode.
Il incombe à l’utilisateur de s’assurer que la méthode d’essai choisie pour les échantillons d’eau soumis à essai est valide.

Kakovost vode - Stroncij Sr-90 in stroncij Sr-89 - Preskusne metode s štetjem s tekočinskim scintilatorjem ali proporcionalnim štetjem (ISO 13160:2021)

General Information

• Status: Published
• Publication Date: 27-Jul-2021
• Withdrawal Date: 30-Jan-2022
• ICS: 13.060.60 - Examination of physical properties of water
• ICS: 17.240 - Radiation measurements
• Technical Committee: CEN/TC 230 - Water analysis
• Drafting Committee: CEN/TC 230 - Water analysis
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 28-Jul-2021
• Completion Date: 28-Jul-2021
• Ref Project: SIST EN ISO 13160:2021 - Water quality - Strontium 90 and strontium 89 - Test methods using liquid scintillation counting or proportional counting (ISO 13160:2021)

Relations

• Replaces: EN ISO 13160:2015 - Water quality - Strontium 90 and strontium 89 - Test methods using liquid scintillation counting or proportional counting (ISO 13160:2012)
• Effective Date: 17-Apr-2019

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2021
Nadomešča:
SIST EN ISO 13160:2016
Kakovost vode - Stroncij Sr-90 in stroncij Sr-89 - Preskusne metode s štetjem s
tekočinskim scintilatorjem ali proporcionalnim štetjem (ISO 13160:2021)
Water quality - Strontium 90 and strontium 89 - Test methods using liquid scintillation
counting or proportional counting (ISO 13160:2021)
Wasserbeschaffenheit - Strontium-90 und Strontium-89 - Verfahren mittels
Flüssigszintillationszählung oder Proportionalzählung (ISO 13160:2021)
Qualité de l'eau - Strontium 90 et strontium 89 - Méthodes d'essai par comptage des
scintillations en milieu liquide ou par comptage proportionnel (ISO 13160:2021)
Ta slovenski standard je istoveten z: EN ISO 13160:2021
ICS:
13.060.60 Preiskava fizikalnih lastnosti Examination of physical
vode properties of water
17.240 Merjenje sevanja Radiation measurements
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 13160
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2021
EUROPÄISCHE NORM
ICS 13.060.60; 17.240 Supersedes EN ISO 13160:2015
English Version
Water quality - Strontium 90 and strontium 89 - Test
methods using liquid scintillation counting or proportional
counting (ISO 13160:2021)
Qualité de l'eau - Strontium 90 et strontium 89 - Wasserbeschaffenheit - Strontium-90 und Strontium-
Méthodes d'essai par comptage des scintillations en 89 - Verfahren mittels Flüssigszintillationszählung
milieu liquide ou par comptage proportionnel (ISO oder Proportionalzählung (ISO 13160:2021)
13160:2021)
This European Standard was approved by CEN on 10 June 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13160:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 13160:2021) has been prepared by Technical Committee ISO/TC 147 "Water
quality" in collaboration with Technical Committee CEN/TC 230 “Water analysis” the secretariat of
which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by January 2022, and conflicting national standards shall
be withdrawn at the latest by January 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 13160:2015.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN websites.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 13160:2021 has been approved by CEN as EN ISO 13160:2021 without any modification.

INTERNATIONAL ISO
STANDARD 13160
Second edition
2021-07
Water quality — Strontium 90 and
strontium 89 — Test methods using
liquid scintillation counting or
proportional counting
Qualité de l'eau — Strontium 90 et strontium 89 — Méthodes d'essai
par comptage des scintillations en milieu liquide ou par comptage
proportionnel
Reference number
ISO 13160:2021(E)
©
ISO 2021
ISO 13160:2021(E)
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
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Phone: [phone]
Email: [e-mail]
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Published in Switzerland
ii © ISO 2021 – All rights reserved

ISO 13160:2021(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Principle . 2
4.1 General . 2
4.2 Chemical separation . 3
4.3 Detection . 3
5 Chemical reagents and equipment . 3
6 Procedure. 4
6.1 Test sample preparation . 4
6.2 Chemical separation . 4
6.2.1 General. 4
6.2.2 Precipitation techniques . 5
6.2.3 Liquid–liquid extraction technique . 6
6.2.4 Chromatographic technique . 6
6.3 Preparation of the source for test . 6
6.3.1 Source preparation for liquid scintillation counter . 6
6.3.2 Source preparation for proportional counter . 6
6.4 Measurement . 7
6.4.1 General. 7
6.4.2 Liquid scintillation counter . 7
6.4.3 Proportional counter . . 7
6.4.4 Efficiency calculation . 8
6.4.5 Determination of the chemical yield . 8
7 Expression of results . 9
90 90
7.1 Determination of Sr in equilibrium with Y . 9
7.1.1 Calculation of the activity concentration . 9
7.1.2 Standard uncertainty . 9
7.1.3 Decision threshold.10
7.1.4 Detection limit .10
90 90
7.2 Determination of Sr from separated Y .10
7.2.1 Calculation of the activity concentration .10
7.2.2 Standard uncertainty .11
7.2.3 Decision threshold.12
7.2.4 Detection limit .12
90 89 90 90
7.3 Determination of Sr and Sr utilizing Sr/ Y equilibrium.12
7.3.1 Calculation of the activity concentration .12
7.3.2 Standard uncertainty .13
7.3.3 Decision threshold.14
7.3.4 Detection limit .15
8 Limits of the coverage intervals .15
8.1 Limits of the of the probabilistically symmetric coverage interval .15
8.2 Limits of the shortest coverage interval .16
9 Quality control .
...